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Ezgi Çiçek c5ca4db8d0 [pulse][impurity] Use pulse for detecting impurity ... Summary: Introduce a new experimental checker (`--impurity`) that detects impurity information, tracking which parameters and global variables of a function are modified. The checker relies on Pulse to detect how the state changes: it traverses the pre and post pairs starting from the parameter/global variable and finds where the pre and post heaps diverge. At diversion points, we expect to see WrittenTo/Invalid attributes containing a trace of how the address was modified. We use these to construct the trace of impurity. This checker is a complement to the purity checker that exists mainly for Java (and used for cost and loop-hoisting analyses). The aim of this new experimental checker is to rely on Pulse's precise memory treatment and come up with a more precise im(purity) analysis. To distinguish the two checkers, we introduce a new issue type `IMPURE_FUNCTION` that reports when a function is impure, rather than when it is pure (as in the purity checker). TODO: - improve the analysis to rely on impurity information of external library calls. Currently, all library calls are assumed to be nops, hence pure. - de-entangle Pulse reporting from analysis. Reviewed By: skcho Differential Revision: D17051567 fbshipit-source-id: 5e10afb4f		5 years ago
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infer-analyze.txt	[pulse][impurity] Use pulse for detecting impurity	5 years ago
infer-capture.txt	[sqlite] page and cache size flags and defaults	5 years ago
infer-compile.txt	make --debug option side-effect free	5 years ago
infer-explore.txt	[help] scrub default values in the checked-in version of the manuals	5 years ago
infer-full.txt	[pulse][impurity] Use pulse for detecting impurity	5 years ago
infer-report.txt	[pulse][impurity] Use pulse for detecting impurity	5 years ago
infer-reportdiff.txt	make --debug option side-effect free	5 years ago
infer-run.txt	[sqlite] page and cache size flags and defaults	5 years ago
infer.txt	[pulse][impurity] Use pulse for detecting impurity	5 years ago